Apparatus for producing a collar or coupling for a tube



June 7, 1960 n. J. VOORHORST 2,939,208

APPARATUS FOR PRODUCING A COLLAR OR COUPLING FOR A TUBE Original FiledJan. 28, 1957 2 Sheets-Sheet 1 INVENTOR ATTORNEYS June 7, 1960 D. J.VOORHORST 2,9

APPARATUS FOR PRODUCING A COLLAR OR COUPLING FOR A TUBE Original FiledJan. 28, 1957 2 Sheets-Sheet 2 INV ENT OR fieni' Jazz l borfiansi' BY2%;M

ATTORNEYS United States Patent APPARATUS FOR PRODUCING A COLLAR ORCOUPLING FOR A TUBE Derk Jan Voorhorst, Arnhem, Netherlands, assignor toW. J. Stokvis Koninklijke Fabriek Van Metaalwerken N.V., Arnhem,Netherlands, a company of the Netherlands Original application Jan. 28,'1957, Ser. No. 636,714. Divided and this application Feb. 19, 1958,Ser. No.

2 Claims. (Cl. 29-235) This invention relates to a tube formed with acollar and, more particularly, to an apparatus for use in the productionof the tube collar.

This application is a division of my copending application, Serial No.636,714, filed January 28, 1957, for Tube and Method and Apparatus forProducing Tube.

Tubes having collars provided as a result of a deformation of the tubesthrough the medium of internal rings, particularly when simple andcapable of being readily formed, satisfy a long felt need. It is anobject of the present invention to provide such a tube and especially toprovide an apparatus capable of use in the formation of the tube. Theinvention contemplates the formation of a tube of plastic, rubber orother readily deformable elastic material with a collar which may serveas an abutment for a swivel member such as, for example, a section of aconnector.

More specifically, this invention has as an object to provide anapparatus which will permit the formation of a tube with a collar by theuse of a ring inserted within the tube, the ring being formed of amaterial which is harder and less elastic than the material of the tube.A metal ring may be employed. The ring, according to the presentinvention, has an external diameter which is larger than the internaldiameter of the tube and it is maintained in position by the resiliencyof the tube.

Since the collar formed on the tube in accordance with this inventionresults from locally expanding the tube by the insertion of the ring,and since the tube is deformable so that a localized collar will existon the tube, the collar is capable of use as an abutment or coupling fora swivel or other sleeve member.

When the tube formed in accordance with this invention is to be used ina manner in which pressure will be exerted against the collar, such aswhen a swivel member is tightened, it is important that the ring beformed of a material of such hardness and strength that it will notcompress into the interior of the tube and thereby lose itseffectiveness.

In accordance with the preferred form of the invention, the ring isprovided with an internal diameter which is substantially equal to theinternal diameter of the tube so that the collar will exist externallyof the tube and yet the ring itself will provide little or no resistanceto the passage of liquids through the tube and thereby will cause noappreciable turbulent fiow and resulting objectionable nolse.

It is possible when the ring is applied within a tube of sufficientelasticity for the ring to be inserted straight into the tube. However,it is the purpose of the present invention to provide an apparatus formaking a collar on a tube of plastic, rubber or other readily deformablematerial by inserting the ring within the tube in a sloping position andsubsequently tilting the same until the ring is on a plane practicallyperpendicular to the axis of the tube and the tube is deformed with anexternal collar.

Other objects and advantages will become apparent from the followingdetailed description of the drawings and from the discussion of themanner in which the apparatus can be used in the application of the ringin the formation of the collar on the tube.

In the drawings: 7

Figure 1 illustrates a side elevation of one form of the device made inaccordance with the present invention for positioning the ring in thetube.

Figure 2 is a sectional view of the preferred ring formed in accordancewith this invention, the ring being adapted to be inserted by the deviceof Figure 1.

Figure 3 is an enlarged view in side elevation of the head section ofthe device shown in Figure 1 illustrating in dotted lines the manner inwhich the ring is placed in position before insertion into the tube.

Figure 4 is an end view of the head section shown in Figure 3.

Figure 5 is a section through the tube into which the head section ofthe device, with the ring mounted thereon, is inserted in the initialposition for the positioning of the ring within the tube.

Figure 6 is a view similar to Figure 5 in which the device has beenmanipulated to a position wherein the ring is in its final positionwithin the tube.

Figure 7 is a view similar to Figure 6 with the device being tilted forremoval from the tube with the ring being retained in its finalposition.

Figure 8 is a side elevation similar to Figure 1 showing a simplifiedform of the device, and

Figure 9 is a sectional view, similar to Figure 5, showing the headsection of the device of Figure 8, with the ring mounted thereon, in theinitial position for inserting the ring in the tube.

Now, in referring to the drawings in detail, reference is made to Figure1 which illustrates the apparatus or device for the placement of thering in position. In this figure the device is shown as being formedwith the handle 1 and the head section 2, which head section is ofgenerally cylindrical form and preferably should be of a diametersubstantially equal to the internal diameter of the tube in which thering is to be positioned.

Extending forwardly of the head 2 is a rim or finger 3, which isrelatively short in the axial direction and which is shaped so as to beslightly conical. The diameter of the finger is such that a smallshoulder 4 is formed by the end of the head 2 which it extends beyondthe diameter of the finger 3, which shoulder provides an abutting edgefor the ring which may be mounted upon the finger.

Extending outwardly from the lower portion of the face of the finger, asillustrated in the drawings, is a stud 5 which has its lower edge onthesame plane as the adjacent portion of the head which forms the shoulder4. By arranging stud 5 so that it does not project beyond thecircumference of the cylindrical head 2 it does not interfere with thepositioning of the ring, although, of course, since in the positioningof the ring within the deformable and resilient tube a long stud couldbe accommodated, the measurement of the stud is not critical.

In the form illustrated in Figures 1, 3 and 4, the head 2 of the deviceis recessed at 6 and a notch 7 is formed in this recessed section of thehead. However, the notch may be form d so as to occupy substantially theentire recessed section, as shown in Figures 8 and 9. The purpose of theformation of the head as thus described will be explained hereafter.

Although the ring to be applied in position within the tube for theformation of the collar thereon may be of modified construction, thepreferred form of ring made in accordance with this invention isdesignated in the drawings with the numeral 8 It will be seen that thepreferred ring 8 is rounded on its external surface'a'nd that theinterior surface thereof is made cylindrical.

In Figure 3 the head of the device 2 is illustrated with connection witha tube 9 in Figures 5, 6 and 7.

the ring of the form shown portion arranged between the shoulder 4 andthe stud 5 in a position capable of being moved as illustrated by thearrow A until the ring abuts the shoulder4 along its entireedge. 1 b Thestud 5 is in line with the notch 7 and the stud is restricted in Widthfor ease of placement of the ring, the stud 5 being required only forthe purpose of holding the ring 8 at one side. in its position upon thehead at the time that the ring is being placed within the tube; I Themanner in which the device of Figure 1 is to be utilized in thepositioning of the ring 8 is illustrated in Ring 8 is applied to thedevice in the manner shown in Figure 3 and then the device with the ringthereon is inserted into the tube 9 in the manner illustrated in Figure5. The device is inserted into the tube as far as is permitted by the,surface 11 defining one wall ofthe notchl. Limiting surface 11 abutsagainst the terminal edge 16 ofithe tube 9. As the apparatus is pivotedupwardly in the direction of arrow B in Figure 5, the ring is drivenwith force into the material from which tube 9 is formed until the ringis perpendicular to the axis of the tube. As the device ,is moved toplace the ring 8 in its operative posiiton within the tube 9 it movesabout a fulcrum point 12, as illustrated in Figure 5. Point 12 forms thecenter'of the curve of the surface 11 of notch 7.- It will be clear fromthe function of the apparatus as thus described that as it is moved inthe direction of the arrow B the cylindrical surface of the head 2 movesuntil it contacts the inner wall of the tube 9 as shown in Figure 6. a

, 'During the movement of the device to the position of Figure 6, thematerialofwhich the tube 9 is made is expandedby the ring 8 and auniform collar 13 is caused to exist on the tube. In order to remove theapparatus from the tube as thus formed with its collar, it is onlynecessary that the apparatus be moved in accordance with arrowC asillustrated in Figure 7, whereby stud 5 is elevated above the ring andthe upper cylindrical por-' tion of the head is removed from contactwith the interior of the tube. The apparatus may then be readilywithdrawn. v. 7

From the above it will be clear that the formation or the collar 13 uponthe tube 9 by the insertion of the ring 8 in accordance with the presentinvention is very simple and accurate and may be performed very rapidly.

in Figure 2 having its lower a position corresponding to the Figure 6position; thereafter the device may be withdrawn in the same manner asdescribed above with reference to Figure 7.

Since the tube of the present invention is to be formed with a collar asa result of the deforming of the tube by the driving or forcing ofthering into position, it is necessary'that'the material. from whichthe'tube isconstructed be such that it is elastic andcapable of beingdeformed and it should have sufiicient resiliency to allow the ring tobe held. firmly in its operative position.

T he invention contemplates the use of the tube formed of plastic,rubber or other deformable elastic materials. It may, if desired, beformed of polyethylene or 'nylon. It will also be clear. that thematerial of -ring 8 must necessarily be harder and'less elastic than thematerial of the tube, since the ring is utilized to deform the tube andmust resist collapsing intothe interior of the tube, particularly underexterior, pressure. Thus, a ring of metal may be employed. i

As has been indicated above, the ring may be inserted into its positionwithin the tube by means'of the novel apparatus constructed inaccordance with the present invention. r

Various modifications may be made without departing from the spirit ofthis invention.

What is claimed is: a I g 1. An apparatus for use in inserting arelatively hard ring within a tube for the formation of an externalcollar thereon by deformation of the wall of the tube, compris-Furthermore, the apparatus for use with the ring when ,used intheproduction of the tube with a collar in accordance with thisinvention is inexpensive and assures accuracy.

The position of the ring 8 on the finger 3 (Figure 3),

:theinsertion of the apparatus into the tube 9 (Figure 5),

the swiveling'motion. of the apparatus into the position according toFigure 6, the swiveling motion of the apparatus in thereverse directionand its withdrawal from the tube is a substantially continuous operationrequiring very little time and no skill.

The position in which the ring is placed within the tube, and thedistance that collar 13 is to be from the recessed portion-6,'then thehead of the apparatus may be inserted into the tube until the deepestpoint 16 of the recess abuts against the terminal edge of the tube.Then, from the position shown "in Figure 9, the device may be pivotedupwardly in the direction of arrow B to ing a handle and a headforwardly of the handle, a finger extending forwardly of the head, saidhead having a cylindrical pontion with a forward wall projecting beyondthe circumference of the finger thereby to form a stop against which aring may rest when being inserted in a tube, said head having a recessformed therein rearward of said finger so that said finger'can beinserted laterally into a tube having an internal diameter substantiallythe same as the diameter of the head so that the ring is in an angularposition relative to the end of said tube, whereby the ring ispositioned by inserting the apparatus laterally into the tube and isthen urged into its final position by the upward pivotal movement of theapparatus.

2. An apparatus for use in inserting a relatively hard ring within atube for the formation of an external collar thereon by deformation ofthe wall of the tube, comprising a handle and a head forwardly of ,thehandle, a finger extending forwardly of the head, said head having acylindrical portion with a forward wall projecting beyond on-a'centersubstantially at the line of intersection of the first mentioned wall ofthe notch with the cylindrical surface of the head, whereby the ring ispositioned by inserting th apparatus into the tube" at an inclinationand is then, urged into its finalposition by the movement of theapparatus about said center point, the ring being then guided into itsultimateposition by the curvature of said second wall of the notchwithout displacement.

References Cited in the file of this patent UNITED STATES PATENTS2,276,303 Herrig ..l r Mar. 17, 1942 2,775,025: Williams Dec. 25, 1956FOREIGN PATENTS 7 354,046 France July 17, 1905

